Insulator.



W. E. WILSON.

INSULATOR.

APPLICATlOR FILED AUGJ9. I916.

1,208,874. Patented Dec. 19,1916.

WILLIAM E. WILSON, 0F LOOKOUT, WEST VIRGINIA.

INSULATOB.

Specification 01 Letters Patent.

Application fled Ann 19, 1918. Serial No. 115,878.

To all whom it may concern:

Be it known that I, IVILLIAM E. Wn'isoN, a citizen of the United States, residing at Lookout, in the county of Fayette and State of \Vest Virginia, have invented certain new and useful Improvements in Insulators, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates-to insulators such as used for supporting telegraph and telephone wires, line wires and like conductors.

The general object of the invention is to provide means for detachably looking a c0nductor to the insulator, this means doing away with the necessity of tying the conductor in place, but permitting however, the ready detachment of the conductor from the insulator when desired.

Av further object of the invention is to provide a conductor engaging means mounted on the insulator which will lock the conductor from longitudinal movement.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein:

Figure 1 is an elevation of my improved insulator partly broken away; Fig. 2 is an elevation looking from a point at rightv angles to the point of view in Fig. 1, the lower portion of the insulator being broken away; and Fig. 3 is a section on the line 33 of Fig. 1

Referring to these figures 10 designates the body of the insulator which may be made of glass, porcelain or other suitable non-conducting material. The insulator body may have any desired form, but is illustrated as somewhat conical and is formed at diametrically opposite points with the vertically disposed grooves 11, these grooves converging toward the upper end of the insulator. A passage 12 is also formed transversely through the insulator, this passage intersecting the grooves 11. Extending transversely through the insulator is a passage 13 for the conductor 14. This passage is relatively deep, and extending from the side face of the insulator upward and intersecting this passage is a slot 15, the upper end of the bottom of this slot being disposed above the bottom of the passage 13, as illustrated most clearly in Fig. 2.

For the purpose of locking the conductor or wire 14: in place within the insulator, I

' tion of the conductor.

dispose within the passage 12 the transversely extending bar 16, which is bifurcated at its ends and which is held in" place by a pin 17. Mounted in the bifurcated ends of this bar are the clamping members or dogs 18. These clamping dogs are disposed n the grooves 11 and the upwardly extendmg arms 19 of the dogs are engaged by a coiled compression spring 20 which acts to force these arms away from each other and force the lower ends of the clamping dogs toward each other. The lower ends of the dogs are relatively sharp edged and these sharp lower ends are normally spaced from the bottom of the passage 13 a. distance about half the diameter of the conductor 14 when these dogs are in a vertical position.

In the practical use of myinvention the conductor 14 is inserted within the passage 13 in the usual manner through the slot 15, the upper ends of the dogs being drawn toward each other so as to permit the inser- The dogs are then released and the spring 20 causes the lower ends ofthe dogs to approach each other and bite or bind upon the wire or conductor 14, holding this conductor from any upward movement which would detach it from the insulator. Furthermore, these dogs exert a camming action and one or the other of the clamping dogs bites into the wire, if the wire be pulled longitudinally in one direction or the other, thus effectively preventing longitudinal movement of the wire through the conductor. Thus if the wire breaks, the conductor will not slip through the passage 13 but will be held in engagement with the insulator. While I have illustrated a spring 20 for holding the dogs in operative position, it is obvious that the dogs may be weighted so as to cause the lower ends to swing inward.

The insulator body is formed with the usual screw-threaded bore 21 for the reception of the screw-threaded supporting pin or may be otherwise formed as necessity may require.

. I, of course, do not wish to limit myself to any particular form for the insulator itself, as my invention is applicable to insulators having a widerange of form.

Having described my invention, what I claim is:

1. An insulator comprising a body formed with a conductor passage and a slot intersecting the passage, the upper end of the Patented Dec. 19, 1916. Y

body on diametrically opposite sides being formed with vertically extending grooves intersecting said passage, oppositely disposed dogs pivotally mounted intermediate their ends in said grooves, the low'e'r ends grooves intersecting said passage, and a dog.

pivotally mounted within each of said grooves, the inner end, of the dog being engageable with a conductor disposed within the passage.

3. An insulator comprisin a body formed with a conductor passage, t e outer end of the body on diametrically opposite sides being formed with longitudinally disposed grooves intersecting said .passage, .a dog the bar.

pivotally mounted within each of said grooves, the inner end of the dog being engageable-with a conductor disposed within the passage, and means for forcing the inner end of said dog toward the body.

4;. An insulator comprising a body formed with a conductor passage, the outer por tudinally disposed grooves intersecting said passage,v a dog 'pivotally mounted intermediate'its length Within each of said grooves, the. inner ends of said dogs being engageable with a conductor disposed within the passage,',jand an expansible member. interposed between the outer ends of the dogs for urging the inner ends of the dogs in a direction toward the body.

5. An insulator comprising a body formed with a conductor passage and longitudinally disposed grooves intersecting said passage, a bar'dis'posed'through the body and extending within the grooves, and dogs pivotally Engaged with'the extended portions of the 6. An insulator comprising a body formed with a conductor passage,-a bar disposed through the body and extending beyond opposite sides; thereof, and locking dogs pivotally engaged with the extended portions of In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

WILLIALI E. WILSON. Witnesses? R. A. THOMPSON, W. R. HEIiNDON.

- tion of the body being provided with longi- I 

